Hey you only need one scale really: The major scale. That gives you 7 modes and pentatonics, major & minor, all in one place. Nobody uses the melodic minor, and harmonic minor is just a raised 7th ^__

Everything else is just a footnote.

It's great! I can tell you've had a proper teacher, your technique looks solid to me, a self-taught loser.

Here's my one-handed rendition I just did for this comment, while holding my phone lol, not the most stable set up.